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60 changes: 60 additions & 0 deletions
60
packages/ui/src/components/Visualization/Custom/target-anchor.test.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| import { Node, Point, Rect } from '@patternfly/react-topology'; | ||
| import { TargetAnchor } from './target-anchor'; | ||
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| describe('TargetAnchor', () => { | ||
| /** | ||
| * ______ | ||
| * | | height: 50 | ||
| * |____| | ||
| * width: 50 | ||
| * | ||
| * (*) reference point | ||
| * (x: 100, y: 100) | ||
| */ | ||
| it('should return the closest point of a rectangle to a reference point below', () => { | ||
| const element = { | ||
| getBounds: () => new Rect(0, 0, 50, 50), | ||
| } as Node; | ||
| const targetAnchor = new TargetAnchor(element); | ||
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| const reference = new Point(100, 100); | ||
| const result = targetAnchor.getLocation(reference); | ||
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| expect(result).toEqual({ x: 50, y: 50 }); | ||
| }); | ||
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| /** | ||
| * | ||
| * (*) reference point | ||
| * (x: 25, y: 25) | ||
| * ______ | ||
| * | | height: 50 | ||
| * |____| | ||
| * width: 50 | ||
| * top left corner: (0, 100) | ||
| */ | ||
| it('should return the closest point of a rectangle to a reference point above', () => { | ||
| const reference = new Point(25, 25); | ||
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| const element = { | ||
| getBounds: () => new Rect(0, 100, 50, 50), | ||
| } as Node; | ||
| const targetAnchor = new TargetAnchor(element); | ||
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| const result = targetAnchor.getLocation(reference); | ||
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| expect(result).toEqual({ x: 25, y: 100 }); | ||
| }); | ||
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| it('should delegate to the super class to get the reference point', () => { | ||
| const superSpy = jest.spyOn(TargetAnchor.prototype, 'getReferencePoint'); | ||
| const element = { | ||
| getBounds: () => new Rect(0, 0, 50, 50), | ||
| } as Node; | ||
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| const targetAnchor = new TargetAnchor(element); | ||
| targetAnchor.getReferencePoint(); | ||
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| expect(superSpy).toHaveBeenCalled(); | ||
| }); | ||
| }); |
51 changes: 51 additions & 0 deletions
51
packages/ui/src/components/Visualization/Custom/target-anchor.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| import { AbstractAnchor, Point, Rect } from '@patternfly/react-topology'; | ||
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| export class TargetAnchor extends AbstractAnchor { | ||
| getLocation(reference: Point): Point { | ||
| return this.closestPointOnRectangle(this.owner.getBounds(), reference); | ||
| } | ||
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| getReferencePoint(): Point { | ||
| return super.getReferencePoint(); | ||
| } | ||
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| private closestPointOnRectangle(rect: Rect, point: Point): Point { | ||
| // Deconstruct the rectangle and point parameters | ||
| const { x: rx, y: ry, width, height } = rect; | ||
| const { x: px, y: py } = point; | ||
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| // Calculate the projections on the edges | ||
| // For left edge | ||
| const leftX = rx; | ||
| const leftY = Math.max(ry, Math.min(py, ry + height)); | ||
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| // For right edge | ||
| const rightX = rx + width; | ||
| const rightY = Math.max(ry, Math.min(py, ry + height)); | ||
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| // For top edge | ||
| const topX = Math.max(rx, Math.min(px, rx + width)); | ||
| const topY = ry; | ||
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| // For bottom edge | ||
| const bottomX = Math.max(rx, Math.min(px, rx + width)); | ||
| const bottomY = ry + height; | ||
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| // Calculate distances to each edge projection | ||
| const distances = [ | ||
| { x: leftX, y: leftY, dist: Math.hypot(px - leftX, py - leftY) }, | ||
| { x: rightX, y: rightY, dist: Math.hypot(px - rightX, py - rightY) }, | ||
| { x: topX, y: topY, dist: Math.hypot(px - topX, py - topY) }, | ||
| { x: bottomX, y: bottomY, dist: Math.hypot(px - bottomX, py - bottomY) }, | ||
| ]; | ||
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| // Find the minimum distance | ||
| const closestPoint = distances.reduce( | ||
| (minPoint, currentPoint) => (currentPoint.dist < minPoint.dist ? currentPoint : minPoint), | ||
| { x: 0, y: 0, dist: 0 }, | ||
| ); | ||
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| // Return the closest point | ||
| return new Point(closestPoint.x, closestPoint.y); | ||
| } | ||
| } |